While we don't have a proper Halloween event this year in Eorzea, the Final Fantasy XIV team still made the Haunted manor available at the same time as the Make it Rain Campaign Event.
FFXIV The Haunted Manor in 2020
To get to the Haunted Manor you will need to head to the Gold Saucer and go to the Main Counter.
Once there you'll be able to talk to the Genial Cruiser (X: 5.2 Y: 6.2)
This year the Haunted Manor is quite simple as, except for the decoration and screenshot potential, only one attraction is available.
Once in the Manor, you can head to the main room — just under the main staircase — and talk to the Unsavory Imp (X: 11.2 Y: 11) to transform in one of the characters from the story.
The transformation you get depends on your answer combination and looks like there are quite a lot of them, which is your favorite?